Telemeter.



R. sTtiTzER.

TELEMETER. APPLICATION FILED JULY 30, 1912 l @85;883. K Patented Feb.3,1914.

BBHBETS-SHEETI.

, R. STUTZER.

TELEMETER. APPLICATION FILED JULY 30, 1912.

.1 5 3 Patented Feb.3,1914.

3 SHEETS-SHEET 2.

R. sTU'TzER.

TELEMETEB.

APPLICATION FILED JULY 30, 1912.

1,085,883., I Patentd Feb. 3, 1914.

8 SHEETSSHEET 3.

. Ara /10' BUBBLE STllTZEISt, O23 QEEA, GE MAKE,

ossess.

Specification of Letters Extent.

' racemes rec. arose.

Application filed July so, 1935?. Es-rial E's; 312.15%.

To all whom it may concern Be it known that l. RUDOLF t TJTZ'E-R, a-

citizen of the German Empire, residing at Jena. Germany. have invented a new and useful Tel-emcter, of which the following is a specification.

it disposed in the other Way, and from the two oppositely incorrect results of this eter enriched by a new, advantageous;

kind. The following are the of this welldruown class. in of the telemei-er a reflecting system is dis posed in such a manner that it brings the two axial rays, which enter the telcmetcr parallel to each other at a distance apart in the sighting plane equal to the length at the base-line, closer together in the said plane, while preserving as far as possible their parallelism. Further, in order to neutralize for measi ing purposes the contingent error of reflection the small angle formed with each other in the sighting plane by the characteristics 1 the front part 5 axial rays which have entered the teleml eter parallel to one another, after the action ot the reflecting system on them or one oi them). a device is provided for giving the reflecting system a second disposition, in which the error of; reflection has the same valueas in the first one. T. is class oi telemeter is known from the patient specification 993.667 in tour forms. which are there shown in Figures 1 and 2. Figs. 15 and 16, Figs. andQZ and 28 and 2%. In the first. third and fourth form the reflecting system alters the position of both aerial rays, in the second only the position of one of rays. The telemeter in all four terms can for measuring with either disposition of the reflecting system. On the two dispositions being interchanged the sense (Sign) of the error of reflection is reversed: previously convergence of the originally parallel axial rays was brought about. they are now made divergent to the same extent. and vice versa. Theret'ore. on setting the telemeter before and after this interchange by means of the measuring device for one and the same object, the range indicated. must turn out different in both cases, so long the error of reflection deviates from zero. Now the telemeter must. in order to find the range of an object correctly..be. set twice, once with the reflecting system. disposedin one wayand again with double measurement the correct intermediate value be ascertained (page 6, lines 71 to as of assert).

is done in the fourth form mentioned alcove-the reflecting system with a compensator, which permits of the error of reflection, that may be taken as unchangeable during a series of measurements, being in each case reduced to zero before the commencement of these measurements (page 6, lines 59 to 71 of 993.667).

".he telemeter according to the present invention requires no double measurements with intermediate new disposition of the reflecting system. neither is there combined with its reflecting system a compensator having the purpose of reducing th error of reflection to zero. Of the two dispositions of its reflecting'system oneserres only for measuring, the other only for adjusting. lVith the characteristic of the well-known class. viz. that the error of reflection has the same 'alue with both dispositions of the system. is connected in the case of the new kind the other characteristic. viz. that-this error has with hoth dispositions the same sign. Furthermore. with the reflecting systern in the adjusting disposition. the two tance of which need not be known, or the distant virtual image of a marl: formed by a collimator. The, two images of this adjusting ohiect are set by means of the measuring device. as if the distance of the said ohiect were to be measured. Thereupon on the indicating device the relative position of the scale and the index is adjusted in such a mariner that the distance infinity is indicated. This completes the adjustment.

After the measuring disposition of the reflecting system has heenrestored. the telem- .ter furnishes correct measurements. The reason'is obvious: limvhen measurements areheing made. the object is infinitely distent, the two sigl'iting lines are parallel to one another. as is the case when the reflecting' system is in the adjusting disposition, and the indicating device must indicate in- 'Ehis roundabout method can i be avoided onl by tittmgzrs By the invention a certain class of telemrule of an even number of members.

finit}; after the images ere set, just as at the end of the adjustment, because, according to the above, the value and sign of the error of reflection have not altered by the change in the disposition oi the reflecting system.

The reliecling system composed a A sin gle member may comprise several plane rcflccting surfaces. in general on the disposition of the reflecting system being changed the relative position of the members will also be altered. In order to make it possible for all that, when this change is made, to retain the value of the error of reflection unaltered, the members of the reflecting sys' tem must, at least in part, have the property of invariable deflection, such as is c. g. the case with optical square prisms. There is however a special case, in which the members retain their relative position in pairs and need therefore no longer singly have the property of invariable deflection, but may be constructed as simple reflectors or reflecting prisms. This case occurs, when, the reflecting system having the adjusting disposition, the direction of the entering axial rays (of the distance zero apart) is parallel to the direction of the same rays on the system having the measuring disposition, and when in addition to this, the reflecting system having the measuring disposition, this system brings the two axial rays closer together in such a. manner that their distance apart becomes just half as great as on their entrance into the telemete-r the base-line).

The error of reflection can be represented the difference RL, when ll is understood to be the algebraic sum of all deflections, to which the axial ray passing through the v right-haid objective is subjected by the refleeting system, and L the corresponding sum for the axial ray passing through the' left-hand objective. The deflections in the clockwise direction shall be reckoned as positive.

In theannexed drawing: Fig. 1 is a diegranunatic plan View of one form of the tclemcter according to the invention in the measuring disposition. Fig. 2 is a similar view of another form of the telemetcr. Fig. 3 is a similar view of another form of the telemeter. Fig. i is a diagrammatic plan view of an adjusting disposition according to the invention. Fig. 5 shows another form of such a disposition. Fig. 6 shows a third form of such a disposition. Fig. 7 shows a fourth form of such a disposition. Fig. 8 is a diagrammatic plan view of another form ofthe telcineter in the measuring disposilion. Fig. 9 shows the two adjusting dis positions of the telemeter according to Fig. 8 1n combination. Fig. 10 is a diagrammatic plan view of another form of the telem- (as the length of eter in the measuring disposition. 1]. is a similar view of another form of the tclen1- ctcr. Fig. 12 shows adjusting disposb tion for the two telemeters .arccording to igs. l0 and 11. Fig. 13 shows another such disposition. Fig. l i shows a third such. disposition. Fig. 15 shows a fourth such disposition. Fig. 16 is e diagramnuitic plan view of another form oi the teleineter in the meas- 22 shows the two adjusting dispositions loelonging to the modification according to Fig. 21. Fig. 23 a modified repetition of the telemeter according to Fig. 10. Fig. 26% shows an adjusting disposition of the telemeter according to Fig. 23. Fig. 25 shows another such adjusting disposition. Fig. 26

shows a modification of the telemeter nccord .ing to Fig. 16. Fig. 27 shows an ad usting disposition of the modified telenietcr according to Fig. 26. Fig. 28 shows another ad justing disposition ofv the telemeter according to Fig. 526. Fig. 29 is a horizontal axial section broken as indicated in Fig. 31 etc. constructional example of the combination according to Figs; ltiand 19, the instrument being in the measuring disposition. Fig. 30

is a horizon al axial section broken as indicated in Figs. 32 land 33 of the instrument according; to Fig. 29, in the adjusting disposition. Fig. 31 is a cross-section on line 313l of Fig. 2%. Fig. 32 is it cross-section on line 3232 cfFig. 30. Fig. is a cross-- section on line 33-453 of Fig. 30.

The hose-line B is taken as horizontal.

in Figs. 1. to behind the right-hand one of the two ohj es a the measuring device is indicated 0;, ii re Ling prism ti, which may be displeced the direction oi? the objective axis. The reflecting system is composed of two members. Both members are formed as optical square prisms 1 and 2 of pentagonal form. The prism 1 has the invariable deflection 21,, the prism 53 the invariable deflection The reflecting systern Shown. (the fron't'one) need not be the only reflecting system of the telemetor, out is the only one that need be taken into consideration for the present invention. The objectives a may also be disposed close together, side by side or one above the other. and in both cases he merged into a single objective. The teleinctci can, as may be detoo . prisms "mined, equivalent to that shown in the figpally aignin of. two pentagonal p i eis we the two images, e. g. is may be e Sheree scopic telemeter. In the lest-name i case in the form according Fig. with the righthanrl objective (which receives she origileft-hand axial my) the lefehancl ocular is to be combined and with the left hand objective (which receives the originally right-hand axial my) the righirhnnd reversing prism systems, which ('l'nss one another because otherwise the spatial image would be psemloscopic and the measuring thereby rendered more clifiicult.

The error of reflection is determinecl in the three telemeters according to Figs. 1 t0 3 in the following manner:

In F l and 1 1271 in Fig. 3 B G. IJZ'ZLZHMD The error has thereifcre in these three fmwns of tclemcter the same cmnpcsitien.

The four adjusting dispositions ace-0rding to Figs. 4 in 7 may be useiiwith each of the three telemetersaccorcling to Figs. 1 0 3, so that twelve different censtructionel forms result. In Figs. 2 and 5 the two refleeting prisms must anrl in 6 and 7 they can he dispesetl iii. different heights. Where the axial rays lie one show 6 the other, they are clisiingeishecl by e. thicker line. It easily seen, that l3) all four dispositions the error cf reflection RL again c -2&

the error R-L:u u

In. Fig. 7

R: m 1a L G.

In Fig. 8 the reflecting-s lien: consists Wins 1 and 2. system hrings The axial rays, which this closer together, first cf all impinge on n seccnrl reflecting e'ye'tcfn c; and only then pass through the ohjeciivcs (1. in this In Fig.- 9, as has been indie-areal by the numbers in brackets, by interchanging" the l and 2 a ScCOlldCllSPOSlUOIl is ohure. A hole in the refiecior (8 indicates, that his reflector (lees not act (in the axial ray belonging to the left-hand objective. in

and in both R-L u +u which corresponcis with the error in the measuring disposition.

In Figs. 10 and 11 the reficcting systems are each composed of four members and may be supposed to have resulted from a doubling of the reflecting systems of Figs. '2 and 3 respectively. For Fig. 11 the remark made with reference to Fig. 3. alluding to the carrying out of this primary form as :1 stereoscopic telemeter, theretorc also obtains.

In Fig. 10

In Figs. 12 to if) each example admits of more or less interchanges of the members, without the (Ufidltllfll being infringed. Thur, chis equation is realized in the four example with the sequence pf members as shown, is apparent from the "i'ullmvingt in Fig. 12

in Fig. 15

The telemcter in 16 has a. reflecting system consisting cif four members, which is composed of the two systems according to Figs. 2 and 8. in this case the error Ill in Fig. 17

In F 18 to 28 from among the examples explained so far some are repeatcd with this modification, that the members are rigidly connected in pairs and constructed as simple reflecting prisms. These are special cases; of the kind explained above. The error of reflection can be determined in the same manner as heretofore. The en ,qlcs of deflection of the sc )arate members are certainly no longer invariable, but, each pair of ineml'iers enters into the equations only with the algebraic sum of its deflections. and this value is invariable.

ln Fig. 18 the designation of the prisms has remained the same as in Fig. 2. only that Roman instead of Arabic numerals have been chosen. With this difference the equations for R, L and the error ;R'L5 given for hold good.

The two adjusting. dispositions, 19 and 20 of the telenictcr according to Fig. 18 correspond to those of Fias. 6 and '5'" respectively. Therefore the eqnaq ions given for these two figures again hold good.

In Qll'hc equations given for Fig. 8 hold good. The two adjusting dispositions Fig. 22 belonging to this modification correspond to the two dispositions contained in Fig. 9.

For the modification, Fig. 23. the equations given for Fig. 10 obtain, The two ad just-ing dispositions. 24 and 25. cor-. respond to 13 and 14 resnoctively, the equations given tlior these two latter figures holding good. Finally in Fig. 26 thceqinv time given for Fig. 1G obtain. Of the adjusting dispositions Figs. 27 and 28, belong; ing to this modification. the first one corresponds to Fig. 17. That the second one does not difier from the first one regards the magnitude and sign of the error of re tlection. follows from the fact, that. in both figures R U, in Fig. 27

The pairs of members with two parallel reflecting surt'aces, which are employed in Figs. l8 and 2-3 and for the pair Ill, IV in Fig. 26.; mil er, is Well known, the ad vantage of re-qnirirv; no adjustment at. all.

they permit of eiery ray emerging parallel to itself. The same property apportains. oi; is also n'cll known, to the so-calledcentral relic .or, in which three reflecting surtaccs aredisposcd with the same relatwo inclinations as the three surfaces of 11 oil the sockets 78. i

inane-ea cube-corner. The pair of members I, II in l? .21 and 26 can however be converted 85 into such a. central reflect-or, if one of the surfaces of this pair be replaced by a ridge surface with its edge lying in the principal plane of reflection. In general. the effect of this modification on the position of one of 7o the images may be compensated by replacing in another part of the telemeter a ridge surface by a simple reflecting surface orby replacino' a second simple reflecting surface by a ridge surface.

In the constructnral example, Figs. 29 to 33, there is employed as objective prism system to the lcfthand a pentagonal orism c, to the right-hand a combination of two prisms 0, 0 the lower one 0 of which. is a simple reflecting, the upper one 0 a double reflecting prism. These objective prisms combined with a separating prism system. a, e of well-known construction convert the instrument into a coincidence teleinctcr in the more strict sense of? this term. The ocular f, Fig. 33, serves for viewing its two erect images. The reflecting svstem l, H is mounted in a tube 9, which is journaled so as to be rotatable about its in a special casing 71/. The rotation is limited to one of 180 by means of a slot g" and-a pin if. By the direction of the manipulating handle g the angular position in each case of the tubular mount g may be observed. The casing" 72. ot' the re-' tlectino" system is rotatably connected with the main casing ll of the telemeter by means This rotation also is limited to one of 180, thisbeing brought about on the one hand bv the inclined end surfaces of the sockets 7f, 2' together With the perforated stop 7' and the pin h and on the other hand by the stops 71 and i To. the measuring disposition. Figs. 29 and 3 the pair of members I, II of the reflect/- ing: system lies at the same height as the objective prism 0 and transmits to the lat.- tor the axial ray amicrtaining to the righthand objective (1. The transition to the ad- 19 justinn' disposition. Figs. 30, 32 and 33, is carried out hr rotating both the tube 57 relatively to its casing f1 and this casing. relatively to the main casino- 2' through 180; Of the two axial. rays that. belonging: to the left-hand objective then passes through the van of memhcrs'll. I. while that ilelonging to the right-hand objective enters. after passing below the member ll. directly into the objective prism 0.

It is a notable advantage. that the telemeter takes up less space in the adjusting than in the measuring disposition. It will tl'iorctoro be transported in the adjusting disposition. Hence it will, when being set 125 up again, already be in that disposition,

which would otherwise have to be given tn it, in order to carry out the adjustment, which is necessary after transport.

I claim:

'5 1. In a telemeter, the optical parts of whieh comprise two telescope systems and a reflecting system, a base-line within the instrument, adapted to be divided into two component parts, means for altering the po- 1o SltlOIl of the optical system connected in one such part relatively to that contained in the other, these means comprising a connection between the two said parts, at least one member of the said reflecting system 1 being movable relativelv to the said telescope systems, whereby the said reflecting system is adapted to'assume two dispositions, a measuring disposition and an adjusting disposition, the said reflecting sys- 90 tem in its measuring disposition being adapted to bring the two axial rays, which on entering the telenieter have a distance between them in the sighting plane equal to the length of the said base-line; closer together in the said plane, each of thesaid telescope systems being adapted to receive one such axial ray, the error of reflection with the adjusting disposition having the same value and the same sign as that with the measuring disposition, and, with the adjusting disposition, the distance apart of the two entering axial rays in the sighting plane being zero.

2. In a telemeter, the optical parts of which comprise two telescope systems and a reflecting system consisting of an even number of members, which are connected together rigidly in pairs, a. base-line.within the instrument, adapted to be divided into two component parts, means for altering the position of the optical system contained in one such part relatively to that contained in the other, these means comprising a connection between the two said parts, at least one member'ot the said reflecting system being movable relatively to the said telescope systems, whereby the said reflecting system is adapted to assume two dispositions, a measuring disposition and an adjusting disposition, the said reflecting sys- 5o t-em in its measuring disposition being adapted to bring the two axial rays, which on entering the telemeter have a distance between them in the sighting plane equal to the length of the said base-line, closertogether in the said plane by a half of the said length, the direction of which entering axial rays in the adjusting disposition is parallel to that ofthe entering axialrays in the measuring disposition, theerror of reflection with the adjusting-disposition having the same value and the same sign as that with the measuring disposition, and, with the adjusting disposition, the distance apart of the two entering axial rays in the sight- .5

in lane being zero. v

5 p STUTZER.

RUDOLF Witnesse PAUL Kai-Jenn, RICHARD HAHN. 

